CVE-2022-21710: mediawiki shortdescription Cross-site Scripting

Vulnerability summary

CVE-2022-21710 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in mediawiki shortdescription. EPSS estimates a 1.00% chance of exploitation in the next 30 days, higher than 62.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 24-01-2022
   PublishedVulnerability first disclosed.
2. 22-04-2025
   Last modifiedVulnerability information updated.

Description

ShortDescription is a MediaWiki extension that provides local short description support. A cross-site scripting (XSS) vulnerability exists in versions prior to 2.3.4. On a wiki that has the ShortDescription enabled, XSS can be triggered on any page or the page with the action=info parameter, which displays the shortdesc property. This is achieved using the wikitext `{{SHORTDESC:<img src=x onerror=alert()>}}`. This issue has a patch in version 2.3.4.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.